The residents of Deep South Texas and the RGV will finally get a break from the Excessive Heat that has gripped the region over the last several days. This is thanks to the approach and passage of a cold front later tonight through Monday morning. As this front approaches and moves through the region early Monday, slightly cooler air will move in from the north lowering temperatures a bit tomorrow. In addition to the shift of the winds from the north to northeast on Monday, the cloud cover and rain chances will be on the increase across the region. This will also help hold down the temperatures and heat index values somewhat for the first half of next week.
The passage of the cold front will also increase the potential for some welcome rains across the area through Thursday. Although widespread severe thunderstorms are not expected at this time, an isolated strong to marginally severe thunderstorm is not out of the question on Monday or Tuesday. Overall expected rainfall totals through Thursday look to range from 0.5 to 1.0 inches across much of the region. They may be some isolated higher amounts ranging from 1.0 to 1.5 inches, mainly near the lower Texas coastline. These areas of heavier rainfall may produce some minor nuisance flooding of urban or low lying areas through Wednesday. Motorists should exercise caution next week if encountering any of the stronger thunderstorms.
A more stable and drier airmass will then build over the region starting Thursday with much drier and hotter conditions expected to prevail into next weekend. Heat index values will likely reach into the 100 to 110 degree range next weekend.
Main Forecast Points:
Lower Temperatures and Heat Index values expected on Monday. High temperatures across the region will reach into the 90 to 96 degree range on Monday and Tuesday. Heat index values on Monday will range from 100 to 106 while heat index values on Tuesday will be a little lower ranging from 95 to 100 degrees.
Rainfall chances will increase Monday and Tuesday across the area due to the passage of cold front.
Overall potential rainfall totals for the RGV through next Thursday expected to range generally from 0.5 to 1.0 inches mainly across the eastern counties of Deep South Texas. Isolated higher amounts from 1 to 1.5 inches will be possible mainly near the lower Texas coastline.
Drier and more stable ridging aloft will move back over the region by next weekend resulting in decreasing rain chances and hotter temperatures on and after Thursday. Heat index readings may reach back up into the 100 to 110 degree range next weekend.
What to Watch For/Impact/Actions
Although this front will provide a break from the excessive heat across the region, Temperatures and the associated heat index values can still be dangerous to the residents of Deep South Texas and the RGV this week. Local residents should continue to take extra caution if working or spending time outdoors. Hydrate frequently!
Minor ponding of water on roadways will be possible in the area of stronger thunderstorms mainly Monday and Tuesday. This could cause periods of hazardous driving conditions. Minor nuisance flooding will also be possible in low lying areas.
Although widespread severe thunderstorms are not expected, an isolated strong to marginally severe thunderstorm cannot be ruled out for Monday and Tuesday.